162 lines
4.0 KiB
C
162 lines
4.0 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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typedef struct float8key
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{
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float8 lower;
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float8 upper;
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} float8KEY;
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/*
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** float8 ops
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*/
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PG_FUNCTION_INFO_V1(gbt_float8_compress);
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PG_FUNCTION_INFO_V1(gbt_float8_union);
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PG_FUNCTION_INFO_V1(gbt_float8_picksplit);
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PG_FUNCTION_INFO_V1(gbt_float8_consistent);
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PG_FUNCTION_INFO_V1(gbt_float8_penalty);
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PG_FUNCTION_INFO_V1(gbt_float8_same);
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Datum gbt_float8_compress(PG_FUNCTION_ARGS);
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Datum gbt_float8_union(PG_FUNCTION_ARGS);
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Datum gbt_float8_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_float8_consistent(PG_FUNCTION_ARGS);
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Datum gbt_float8_penalty(PG_FUNCTION_ARGS);
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Datum gbt_float8_same(PG_FUNCTION_ARGS);
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static bool gbt_float8gt (const void *a, const void *b)
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{
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return ( *((float8*)a) > *((float8*)b) );
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}
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static bool gbt_float8ge (const void *a, const void *b)
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{
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return ( *((float8*)a) >= *((float8*)b) );
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}
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static bool gbt_float8eq (const void *a, const void *b)
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{
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return ( *((float8*)a) == *((float8*)b) );
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}
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static bool gbt_float8le (const void *a, const void *b)
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{
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return ( *((float8*)a) <= *((float8*)b) );
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}
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static bool gbt_float8lt (const void *a, const void *b)
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{
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return ( *((float8*)a) < *((float8*)b) );
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}
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static int
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gbt_float8key_cmp(const void *a, const void *b)
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{
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if ( *(float8*)&(((Nsrt *) a)->t[0]) > *(float8*)&(((Nsrt *) b)->t[0]) ){
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return 1;
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} else
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if ( *(float8*)&(((Nsrt *) a)->t[0]) < *(float8*)&(((Nsrt *) b)->t[0]) ){
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return -1;
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}
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return 0;
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_float8,
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sizeof(float8),
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gbt_float8gt,
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gbt_float8ge,
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gbt_float8eq,
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gbt_float8le,
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gbt_float8lt,
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gbt_float8key_cmp
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};
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/**************************************************
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* float8 ops
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**************************************************/
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Datum
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gbt_float8_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo ));
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}
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Datum
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gbt_float8_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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float8 query = PG_GETARG_FLOAT8(1);
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float8KEY *kkk = (float8KEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key ;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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key.lower = (GBT_NUMKEY*) &kkk->lower ;
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key.upper = (GBT_NUMKEY*) &kkk->upper ;
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PG_RETURN_BOOL(
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gbt_num_consistent( &key, (void*)&query,&strategy,GIST_LEAF(entry),&tinfo)
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);
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}
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Datum
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gbt_float8_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc(sizeof(float8KEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(float8KEY);
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PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
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}
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Datum
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gbt_float8_penalty(PG_FUNCTION_ARGS)
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{
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float8KEY *origentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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float8KEY *newentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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float8 res ;
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*result = 0.0;
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penalty_range_enlarge ( origentry->lower, origentry->upper, newentry->lower, newentry->upper );
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if ( res > 0 ){
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*result += FLT_MIN ;
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*result += (float) ( res / ( (double) ( res + origentry->upper - origentry->lower ) ) );
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*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_float8_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo
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));
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}
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Datum
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gbt_float8_same(PG_FUNCTION_ARGS)
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{
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float8KEY *b1 = (float8KEY *) PG_GETARG_POINTER(0);
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float8KEY *b2 = (float8KEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
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PG_RETURN_POINTER(result);
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}
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